Pal/ntsc

[Marcuz]

sorry if the title is not precise, also i'm not sure if this is already possible, i've tryied some setting with no luck.
what i ask for is the ability to stretch the screen from ntsc to pal in games like Lotus or Eye of the Beholder, whych have a black strip at the bottom of the monitor. is it possible? is this even a PAL/NTSC difference, frequency aside, or it is a designer choice? but i've see many other games like that. there are also some cracked games that in the cracktro allows you change between them displays.

[alexh]

Change your emulated window / full screen size to an "NTSC size" one this will have the desired effect.

The number of pixels in low res being displayed in 50Hz PAL is larger than 60Hz NTSC (320x200 vs 320x256?) and lazy game coders used to write games so they worked without change on both.

If you make your emulated screen size smaller in height, the bottom border will be chopped off

The default window resolution is 720x568 (which I have no idea why as this is not PAL or NTSC) but NTSC should be 720x480. You can tweak the height to get rid of the border as you feel.

As for FULL screen modes you will have to create some custom modes using your video card driver (Nvidia) or PowerStrip.

[DamienD]

Originally Posted by alexh

As for FULL screen modes you will have to create some custom modes using your video card driver (Nvidia) or PowerStrip.

I use PowerStrip for this also http://entechtaiwan.net/util/ps.shtm

Great program and works very well

[Toni Wilen]

Originally Posted by alexh

The default window resolution is 720x568 (which I have no idea why as this is not PAL or NTSC) but NTSC should be 720x480. You can tweak the height to get rid of the border as you feel.

Amiga can display about 568 lines in overscan (284 in non-interlaced).

EDIT: Forgot to answer OPs question

what i ask for is the ability to stretch the screen from ntsc to pal in games like Lotus or Eye of the Beholder,

Possible with automatic filter change but it won't look too good if you currently use non-scaled mode. Effect will look similar to "Correct Aspect Ratio setting. Probably another not worth the trouble feature..

[Marcuz]

i did already that, and i used the built in resolutions setup for NVidia cards to make customs (640*512 for instance works well) , but still i cannot stretch the image as wanted. it seems that the ntsc/pal frequencies just lift up and down the screen. there is a full-screen suggested resolution?

[alexh]

640x400? That is the corresponding "NTSC" resolution for 640x512

[Marcuz]

fullscreen: there is no difference at all between 640*400 and 640*480 with default or 60hz NTSC

[nnever2000]

Originally Posted by marco pedrana

fullscreen: there is no difference at all between 640*400 and 640*480 with default or 60hz NTSC

I remember that the black area was present even on a real amiga (with 1084S monitor). So emulation are correct.

Normally I play all game in 1280 x 1024 correcting offset and wide with direct3d filter to stretch the image over all the size and using 2xsai.

Play turrican 2 at full screen is amazing!

[LocalH]

A real NTSC Amiga (or a PAL one in a real NTSC mode) displays taller pixels than a PAL one. I think that's what the OP is inquiring about. Try doing the following:

Set window size to 720x576
Enable "Null filter", 1x in both directions set vertical size to -440, and vertical position to 130

I just did this as a test, so you may want to adjust the vertical size to your taste.

[Marcuz]

Yay! that works! i've set to 640*576, it should be one of the resolution manually added to the ones possible thru nvidia panel. there's the antialiasing of course, but it does the trick, thank you LocalH!
now the point of my initial query is if it's possible to add something like this to Winuae without scaling, if it can work with a resolution that, like 640*576, one can manually add to the OS.

[edit:]mistake, i typed 512 where it should have been 576.

[DamienD]

Originally Posted by marco pedrana

Yay! that works! i've set to 640*512, it should be one of the resolution manually added to the ones possible thru nvidia panel.

Marco, can't you use Powerstrip to add this to the Nvidia panel?

I used it to add 720x576 to my graphics card which wasn't natively supported

[Retro-Nerd]

Originally Posted by DamienD

Marco, can't you use Powerstrip to add this to the Nvidia panel?

I used it to add 720x576 to my graphics card which wasn't natively supported

There is no need for powerstrip. The nvidia detonator driver supports custom resolutions.

[Marcuz]

sorry i've expressed myself poorly: i ALREADY have done that, i use abitually custom configs (640*512, *576, 720*512, 576), but that's not the solution to this problem: i would like instead that winuae would be able to resize the used area of the screen in ntsc to a pal resolution, and if the correspondancy is not perfect, well it would be enough to identify the resolution needed and add it to Nvidia or Ati display

also 640*576 does the trick more often than 720 to me

[LocalH]

720x480/576 is closer to a real Amiga's aspect ratio, as you have to account for the overscan area. 640 is okay for use on a PC monitor, as long as you're aware that the aspect isn't 100% accurate to an Amiga.

[andreas]

there are also some cracked games that in the cracktro allows you change between them displays.

This is correct, and I haven't yet seen WinUAE react properly on this kind of toggling (often right mouse button)
The picture merely trembles a bit as if the rear monitor connector in a real Amiga had a loose contact

Would be nice if it gets supported someday.

PAl is based on Europe's 50Hz cycle of 220volt, as opposed to North America's NTSC which has to use the 60Hz cycle of 110volt... unfortunately, the lower power of the 110@60Hz, is only capable of 240 lines of resolution, whereas the 220@50Hz was capable of easily handling 500 lines.
The conflict is mainly in the hight/width differences, as ntsc is lower resolution, but a wider display thanx to the extra 10Hz in the base power cycle, and PAL come out as a narrower/taller image signal, as it's width is based on 50Hz, put the hight is over double the resolution of NTSC.
For those who want PAL for European games, simply connect a PAL a520 (which can also be modified to output S-video*) to your amiga, and hook it up to a display device that is also PAL capable.
Unfortunately, I have no extra NTSC a520's left... But I do still have 4 PAL a520's I was thinking of selling or trading for a few more NTSC a520's..
So anbody interested in a purchase or trade... email me: trborealis@yahoo.com

[alexh]

Originally Posted by Borealis™

PAl is based on Europe's 50Hz cycle of 220volt, as opposed to North America's NTSC which has to use the 60Hz cycle of 110volt... unfortunately, the lower power of the 110@60Hz, is only capable of 240 lines of resolution, whereas the 220@50Hz was capable of easily handling 500 lines.

Total BOLLOCKS!

1) PAL is 288 lines (interlaced) to NTSC's 240 lines. Not 500!!

2) Power has nothing to do with it. The phase of the supply determined the refresh rate and the bandwidth determined the number of lines.

720*288*50 = 10368000
720*240*60 = 10368000

You think that is a coincidence??

The conflict is mainly in the hight/width differences, as ntsc is lower resolution, but a wider display thanx to the extra 10Hz in the base power cycle

Wider? They are both 720 pixels wide

and PAL come out as a narrower/taller image signal, as it's width is based on 50Hz

Taller? They are both 4:3 ratio. The way they keep the same ratio is because PAL has oblong pixels whereas NTSC has square pixels.

put the hight is over double the resolution of NTSC.

We've been through that!